Tool head unit for machining workpieces with three simultaneously operable rotary axes and machine tool using same

Tool head unit for machining workpieces, in particular a milling head unit for a milling machine spindle, comprising

• a support arm (14), which defines a first rotary axis (C);
• a first head part (16) mounted on the support arm (14), rotatably disposed about the first rotary axis (C) with respect to the support arm (14) and defining a second rotary axis (B) inclined with respect to the first rotary axis (C);
• a second head part (17) mounted on the first head part (16) and rotatably arranged about the second rotary axis (B) with respect to the first head part (16);
• a spindle device (18) mounted on the second head part (17) and rotatably arranged about a third rotary axis (A) with respect to the second head part (17);
• and
• a first drive device (19), a second drive device (21) and a third drive device (22) respectively assigned with the first rotary axis (C), the second rotary axis (B) and the third rotary axis (A) for separately driving and controlling the rotations of the first head part (16), the second head part (17) and the spindle device (18) about the respective first rotary axis (C), the second rotary axis (B) and the third rotary axis (A).